Wormwood, Artemisia absinthium. Official in seventeen standards for some inscrutable reason. Rarely employed medicinally. Is an ingredient of absinthe. The volatile oil in large doses produces cerebral disturbances with epileptiform convulsions.

Levant Wormseed, Artemisia Cina or A. panci-fiora, is the official source of santonin (q. v.). American Wormseed is a different plant. See "Cheno-podium." Mugwort Herb, Lirtemisic vulgaris, has been employed in Homeopathic practice as a remedy for convulsive diseases of childhood.